guider



W. A. GUIDER.

ChHBURETER.

APPLICATION FILED 0c.12. 191a.

Patented June 24, 1919.

2 SHEETS-SHEET l.

I J6 J4 J7 H W. A. GUIDER.

CARBURETER.

APPLICAUON FILED 020.12. 1916.

2 SHEETSSHEET 2 3140mm W/ZGuider flttoznegs Patented June 24 .T wuf y 4 r2 2 UNITED STATES PATENT OFFICE.

WALTER A. comma, or mama HEIGHTS, oHIo.

CARIBURETER.

Application filed December 12, 1916.

To all whom, it may comma.-

Be it known that I, \VALTER A. GUIDER, a citizen of the United States, residing at Linden Heights, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Carbureters, of which the following is a specification.

My invention relates to new and useful improvements in carbureters, the primary object of my invention being the provision of a carburetcr in which the liquid fuel and air are brought together in a new and more efficient manner whereby a more uniform eX- plosive mixture is obtained under all running conditions of an engine with which the carburetor is employed.

In this connection, a still further object of my invention consists in the provision of a novel form of fuel valve for controlling the supply of liquid fuel to the carbureting chamber of the carburetor.

A still further object of my invention consists in providing a compound valve mechanism for controlling the admission of the auxiliary air to the mixing chamber of the carburetor. this valve including gravity closing ball valves operating in conjunction with a manually operable cut ofl valve.

Another object of. my invention resides in the provision of an adjustable valve for eon trollingthe primary air supply and in mounting this valve in such. a manner that in case of back firing it may be completely opened to prevent injury to the carbureter.

Another object of my invention consists in providing an improved form of throttle valve whereby I do away with the employment of the usual butterfly throttle valve which is defective as tending to cause the mixture to pass from the cz'irbureter along one side of the outlet and manifold.

A still further object of my invention consists in constructing the body portion proper of the carburetor in such a manner that it shall have but few parts which may be readily assembled.

With these and other objects in view. my invention will be more fully described, illustrated in the accompanying drawings, and then specifically pointed out in the claims which are attached to and form a part of this application.

In the drawings:

Figure 1 is a central vertical sectional view taken through the carbnreter constructed in accordance with my invention;

Specification of Letters Patent.

ilatcnted J une 24-, 1919.

Serial No. 136.488.

Fig. 2 is a horizontal sectional view taken on the broken line 2-2 of Fig. 1., looking in the direction of the arrows;

Fig. 3 is a corresponding view taken on the line 33 of Fig. 1, looking in the direction of the arrows and showing theball valves and their retaining cages;

Fig. -'l is a sectional view taken on the line l -l of Fig. 1, also looking in the direction of the arrows and illustrating the type of throttle valve employed, the valve in this figure being shown in closed position.

(orresponding and like part are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

My improved carbuirter includes a cu shaped body portion 10 providing the floatchamber and having a radial extension 11 providing a chamber for the fuel inlet valve. The bottom wall of the bortion 11 is formed with a threaded opening to receive one of the threz-ided ends of a coupling nut 12, which end is provided with a frusto-conical valve seat 13 communicating with the fuel passage 14 through the coupling nut and with an annular spring retaining chamber 15 surrounding the valve seat. A needle valve 16 co operates with the valve seat 13 and its stem 17 is passed through an opening formed in a cap 18 which is threaded into an opening 19 in the upper wall of the portion 11 of the carburetor casing and in alinement with the opening for the nut 12. A collar 20 is adjustably mounted, preferably by threading upon the stem 17 and a helical spring 21 seats and is retained at one end in the recess 15 and engages at its other end against the collar to normally hold the valve in open position unless closed by the float, as will be later explained.

A substantially U-shaped float 22 is carried by one end of a float lever 22 and disposed in the float chamber, the opposite end of the float lever being bifurcated to provide fork arms 24 which straddle the valve stem and engage against the upper face of the collar 20. This float lever, intermediate its length, is provided with oppositely formed pivot sleeves 2-5 and a pivot pin 26 is passed through one of the side walls of the portion 11 of the casing, through these alined sleeves and threaded into the opposite side wall of the portion 11 of the casing, as shown in Fig. 2. By this arrangement. it will be clear that the fuel inlet valve 16 will be held in open position by the spring until the fuel level in the float chamber and its extension ll has raised the float suliiciently to cause it to force the needle valve to closed position. The lloat chamber may be flooded at any time by grasping the extending end of the valve stem 17 and raising the valve against the action of the float.

A tubular member. indicated as a whole by the numeral 27, extends at one end through the central portion of the bottom wall of the float chamber 10 and at its other end through the central portion of a cover 28 which closes the upper end of the float chamber and which is formed with a depending marginal flange 29 engaging about the upper edge of the float chamber. That end of the tubular memberZT, above the cover, enlarged somewhat in order to provide a cover engaging shoulder 30 and the opposite end of the tubularmember isthreaded to receive a clamping nut 31 by which means the tubular member may be secured against movement relative to the lloat chamber and the cover Llttllillttl to the upper edge of the float chamber. A packin ring 32 is preferably interposed between the nut and the bottom of the float chamber to prevent leakage of fuel therefrom. The wall of the tubular member is thickened interiorly in termediate its length to provide a downwardly directed frusto-conical valve seat 33 and an upwardly flaring frusto-conical carbureting chamber 34. Furthermore, the wall of the tubular member, at a point spaced somewhat above the bottom of the float chamber, is termed with an encircling series of openings 35. Threaded within the lower end of the tubular member 2 7 is a tubnlarfuel valve 36 which also constitutes the primary air valve, as will be later apparent. The upper or inner end of this combined fuel and air valve is beveled or tapered exteriorly, as shown at 37, for adjustable cooperation with the valve seat 38 so as to provide an annular passage between the valve seat and said end of the valve which passage may be readily varied in area by turning of the valve 36 to raise or lower the valve. That portion of the valve 36, above the openings 35 of the tubular member 27, is reduced to provide an annular chamber with which the openings 35 communicate in order that liquid fuel in the float chamber may enter this annular chamber and stand at a level in it such that it may be drawn through the annular space between the fuel valve and valve seat 33 when the engine is running, as will be later explained. A, packing nut 38 threaded about the lower end of the tubular member 27 serves to prevent leakage of fuel between such tubular member and the combined air and fuel valve 36.

The lower or outwardly projecting end of the tubular valve 36 is formed with a down- \\':-.rdly directed 'l rusto-ciniical valve seat 35.! and immediately above this seat with a spider 40. A frustowonical valve =11 coopcrates with the valve seat 39 and is provided with an outwardly and upwardly directed drip flange 42 adapted to catch and retain any liquid fuel which may overllow into the tubular valve. ,A valve stem l -l is eenueet- Hi to the valve ll and projects through the spider and carries an adjustal'ile collar 4-4, while a helical spring; 45 engages between the spider and collar to normally support the valve 41 in adjusted position. This valve =11 constitutes the primary air valve and is always adjusted so as to be open to a more or less extent so that air may be drawn between it and the valve seat 39 into the central passage of the tubular valve 36. The upper end of this tubular valve 36 is rei'lneed interiorly. as shown at 46, in order that the air passing through it. and into the earburc-it ing chamber 34 may be directed toward the axis of the mixing chamber whereby a veil turi effect is obtained.

The upper end of the tubular member 27 is enlarged to provide the lower portion of a cylindrical mixing chamber 47 communi eating with and concentrically disposed with respect to the carbureting chamber 34. The marginal wall of this lower portion of the chamber 47 is formed at spaced intervals with radial ears l8 which mate with ears 49 of the upper portion 50 of the mixing chamber casing and screws 51 cooperating with these cars serve to clamp the upper and lower portions of the mixing chamber together. The upper portion of the mixing chamber is shaped and ].)roportione .l in accordance with the lower part and is formed centrally with an outlet opening 52 surrounded by a collar 53 whereby it may be operatively connected to an intake manifold. The upper portion 50 of the casing of the mixing chamber is provided with a bottom wall 54 having a plurality of spaced circularly disposed mixture passages 55 through which communication with the lower portion of the mixing chamber is 61 tablished. A disk shaped valve 56 having a corresponding number of correspondingly arranged openings 57 is mounted for turning movement upon the under side of the wall 54 by means of a pivot bolt 58 and retaining nut 59. This valve is provided with a radial arm 60 which projects through a slot 61 formed in the wall of the lower portion of the mixing chamber and which serves as a means for turning the valve disk, this arm being formed with an opening 62 to facilitate its connection with any suitable type of control mechanism. This disk valve constitutes the throttle valve of the carbureter and may be turned to bring its openings 57 into full alinement with the mix ture openings 55 or to bring them completely out of alinement, as desired, any intermediate position being of course permitted.

The lower wall of the lower portion of the mixing chamber 47 is formed with a series of circularly arranged air inlet passages or ports 63 which preferably correspond in number and aline with the mixture passages 55 and which are preferably substantially of the same size. A second disk valve 64, having openings 65, corresponding to the passages or ports 63, is supported against the lower face of the bottom of the mixing chamber by a collar 66 which engages at its free edge against the cover 28 of the float chamber and has an arm 67, corresponding to the arm 60, and having an opening 68. Obviously, the amount of air admitted to the mixing chamber by this disk valve, which constitutes the secondary or auxiliary air valve, may be readily adjusted by turning the valve through any suitable connecting mechanism joined to its arm 67.

In addition to this auxiliary air valve, each of the air inlet ports or passages 63 is normally closed by a gravity closing ball valve 69, these ball valves eing free to move from their seat under a partial vacuum created in the mixing chamber but being held against such displacement as would pre vent them from returning to their seats, each by an individual retaining cage. As best shown in Figs. 1 and 3 of the drawings, each of these cages includes a substantially L-shaped member 71 of wire, one end of which is embedded in the lower wall of the lower portion of the mixing chamber and the other end of which is embedded in the marginal wall thereof so that the member extends across the central portion of the ball valve and in spaced relation thereabove. Each cage further includes a second U- shaped member 72 which intersects the first member, extending at right angles to it and having its ends embedded in the lower wall of the lower portion of the mixing chamber 47. These members may be formed of wire or other suitable material and the resultant cage serves to prevent undue displacement of the ball valves without in any way interfering with the passage of air and gaseous mixture through the lower portion of the mixing chamber to the mixture passages 55.

When installing the above described carbureter, the fuel inlet or float controlled valve 16 is adjusted to insure the proper fuel level in the float chamber and the air inlet valve for the primary air is adjusted to insure supply of a suitable quantity of air. These adjustments are more or less permanent and render the carbureter applicable to engines of different types and power. The fuel valve 36 is then adjusted to provide for the passage of the proper amount of fuel to the carbureting chamber to form a suitable explosive mixture with the air admitted through the valve 41 when the engine is running at low speeds as at that time the ball valves 69 will be closed and no secondary or auxiliary air will be admitted. \Vhen the engine is running, the disk throttle valve 56 is opened to a more or less extent to control the speed of the engine, in the usual manner, and as the speed of the engine increases the disk valve 64 controlling admission of auxiliary air to the mixing chamber is open to a more or less extent to permit the ball valves 69 to come into play and so admit additional air to the carbureting chamber. Obviously, the quantity of liquid fuel admitted to the carbureting chamber 34 will increase out of proportion to the amount of primary air admitted through the valve 41 as the speed of the engine increases and, consequently, as the speed of the engine increases the amount of additional air admitted to the mixing chamber 47 must be increased. This is rendered possible by the compound auxiliary air valves 64 and 69 and the quantity of air admitted by them may be readily controlled. Both the throttle valve and the disk valve 64 may be controlled by any suitable linkage from the drivers seat, the throttle valve preferably having connection with a throttle lever upon the steering column and with an accelerator pedal and the disk valve 64 preferably having connection with a suitable operating od at the dash of the vehicle or with a lever mounted on the steering column,

In order to insure against any closing of the air valve 41, an adjusting screw 73 is threaded through the valve to engage the spider 40 whereby the valve may be held open to any desired extent against the action of the spring 45 and a. lock nut 74 is threaded upon the adjusting screw to prevent its movement when once adjusted.

Having thus described the invention, what is claimed as new is:

1. In a carbureter, a casin providing a float chamber, a Venturi tu e projecting completely through the float chamber with its restricted portion adjacent the fluid level therein, a primary air supply nozzle adjusta bly mounted in the lower end of the Venturi tube and projecting below the float chamber whereby the inner end of said nozzle may be adjusted toward and away from the most restricted portion of the tube, the outer portion of the nozzle fitting snugly within the Venturi tube and the inner portion being reduced to provide with the tube an annular chamber, the wall of the Venturi tube being formed wit-h openings communicating with the chamber, and a mixing chamber communicating with the upper end of the Venturi tube.

2. In a carbureter, a float chamber, a removable top closing the float chamber and formed with an opening, a lower mixing chamber section, an upper mixing section detaehably secured to the lower section, a tubular member extending from the lower section and passing through the opening of the top and through the bottom of the float chamber, a shoulder on the upper end of the tubular member engaging the top to hold it upon the float chamber, elan'iping means carried by the tubular member and engaging the outer face of the bottom of the float chamber, and means cooperating with the tubular member for controlling supply of fuel and air to the mixing chamber.

3. In a carburetor, a casing providing a mixing chamber, a transverse partition dividing the mixing chamber into upper and lower portions, the partition and the lower wall of the lower portion being formed with alined circular series of openings, manually operable disk valves cooperating one with each of such series of openings, automatic valves within the lower portion of the mixing chamber cooperating with the series of openings in the lower wall thereof, and means for admitting a mixture of fuel and air to the lower portion of the mixing chamber.

4. In a carburetor, a casing providing a float chamber having oppositely disposed openings in the top and bottom walls thereof, a tubular member fitted through the said openings, connecting means between the said member and the casing coaeting with the bottom wall of the chamber, a second tubular member mounted in the lower portion of the first member for supplying air interiorly of the said first member, and a slidably mounted valve overlying the lower end of the second member for controlling the flow of air therethrough and formed with an upwardly directed drip flange adapted to receive fuel issuing from the second member.

5. In a carbureter, a casing providing a float chamber, a tubular member fitted through the casing and having communication with the said chamber, a second tubular member mounted in the lower portion of the first member for supplying air interiorly of the first lIlGlTllJel', a combined valve and drip cup overlying the lower end of the second member for controlling the flow of air therethrough and adapted to receive fuel issuing from the second member and yieldable means constantly urging the valve to closed position.

(3. In a carhuretfer, a casing providing a mixing chamber, said casing being formed of upper and lower mating sections, a partition formed on one of said sections and dividing the chamber into upper and lower compartments, said partition being provided with an opening establishing communication between the comparti'nents, means communicating through the bottom wall of said chanrber for admitting a mixture of air and fuel below the partition within the lower conipartment, automatic means cooperating with the bottom wall of the casing beneath the partition for admitting additional air directly into the lower compartment, manually operable means cooperating with said bottom wall for controlling the admission of air to the said automatic means, and means for disehar ing mixed air and fuel from the chamber a ove the partition.

7. In a carburetor, a tubular member, means for supplying liquid fuel to the tubular member, a second tubular member mounted in the lower portion of the first member for supplying air interiorly of the first member, a slidably mounted combined valve and drip cup overlying the lower end. of the second member for controlling the flow of air therethrough and adapted to receive fuel issuing from the second member, yielda'ble means constantly urgin the valve to closed position, and means adjust able upon the valve for spacing the valve from the lower end of the second member.

In testimony whereof I afiix my signature.

WALTER A. GUIDER. [L.s.]

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

